Harken Pulley 57 mm

Discover unparalleled performance and reliability with the HARKEN Pulley 57 mm Black Magic Air Loop Block, a premium fitting engineered for the most demanding sailing conditions. Designed for sailors who refuse to compromise on quality and efficiency, these Pulleys are an essential upgrade for any serious racing or cruising vessel. Elevate your sail control systems with a block that delivers maximum power, minimal friction, and exceptional durability, ensuring smooth and precise adjustments when you need them most. This 57 mm block is a testament to Harken´s commitment to innovation, providing a lightweight yet incredibly strong solution for your boat´s most critical functions.

Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon® roller bearings separated and parallel to reduce friction. The sheave center carries primary load, allowing a smaller, lighter weight block. The soft-attachment Loop block has a removable deadend post for attachment to a padeye. Lashings can also be used.

The engineering genius behind the Harken 57 mm Black Magic Air Block lies in its ability to handle immense loads while running almost effortlessly. The sophisticated bearing system ensures that lines run smoothly and freely, dramatically reducing the effort required for trimming and hoisting sails. This means faster, more responsive sail handling, giving you a distinct competitive advantage in a race and providing easier, safer sailing for cruisers. The significant reduction in friction translates directly to less wear on your lines and more precise control over your sail shape, allowing you to extract every ounce of power from the wind.

A key feature of this advanced pulley is its remarkable strength-to-weight ratio. By designing the sheave to carry the primary load at its center, Harken has created a block that is significantly lighter and more compact than its competitors without sacrificing an ounce of strength. This reduction in weight, especially when used in halyard or masthead applications, lowers the boat´s center of gravity, improving stability and overall performance. The versatile soft-attachment loop design further reduces weight and offers superior articulation compared to traditional metal shackles. This modern approach to rigging is not only lighter but also quieter and kinder to your boat´s surfaces, eliminating noise and potential damage. The removable post allows for secure attachment to a padeye or the use of a lashing for ultimate flexibility in your rigging setup.

Technical Specifications:

* Sheave Ø (mm): 57 mm
* Sheave Ø (in): 2 1/4 in
* Length (mm): 76 mm
* Length (in): 3 in
* Weight (g): 92 g
* Weight (oz): 3.23 oz
* Maximum line Ø (mm): 12 mm
* Maximum line Ø (in): 7/16 in
* Maximum working load (kg): 1134 kg
* Maximum working load (lb): 2500 lb
* Breaking load (kg): 2268 kg
* Breaking load (lb): 5000 lb